JP3807567B2 - Multi-pattern sewing machine position index selection device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a position index selection device used for a sewing machine or the like that performs pattern sewing by indexing a pattern cam corresponding to a stitch pattern by rotating a selection dial.
[0002]
[Prior art]
As a prior art of this type of apparatus, there is Japanese Utility Model Publication No. 63-21250 or Japanese Utility Model Publication No. 1-22342. These publications are configured such that the rotation of the selection dial is reduced to a predetermined ratio by a reduction gear mechanism using a planetary gear train and transmitted to the selection cam shaft. Is transmitted to the pattern display board at a constant speed. The contact is brought into contact with the pattern cam by the phase (position) of the selection cam, and the pattern of the pattern cam is sewn. In the pattern selection operation, the selection dial is rotated so that a desired figure is located at the position of the pointer from the pattern figure group written on the pattern display board.
[0003]
In such a configuration in which the pattern cam is selected via the reduction gear mechanism, it is not necessary to set the size of the selection dial according to the notation of the pattern shape, so that the selection dial can be sized appropriately for operation. In addition, the visibility of the selected pattern is improved.
[0004]
[Problems to be solved by the invention]
However, the reduction gear mechanism of the above prior art has a large number of parts such as three planetary gears, a drive gear, and the like, and the assembly process is complicated, and the shape of the pattern indicated on the pattern display board, the pointer, and the cam surface of the selection cam are The gears must be assembled in phase with each other so as to coincide with each other, and high component accuracy is required, resulting in high costs.
[0005]
Further, as a result of the assembly, there is no adjustment mechanism for errors generated between the shape and the hands and the backlash of each gear, and the selection pattern is inferior in visibility.
The present invention simplifies the reduction gear mechanism that decelerates the rotation of the selection dial and transmits it to the selection cam shaft, and also enables adjustment of the accuracy of the parts and the shift between the shape and the pointer due to the meshing backlash between the gears. It is an object to be solved to provide a position index selection device that performs the above.
[0006]
[Means for Solving the Problems]
In order to solve the above problems, the inventors of the present invention have made various studies and provided an internal gear that inscribes a drive gear for driving a selection cam (indexing means), and on the outer peripheral surface of the internal gear, We thought that the problem could be solved by noting an index figure corresponding to each index position indexed by the selected cam.
[0007]
That is, the invention described in claim 1 is a selection dial for selecting a desired index shape from a plurality of pattern shapes by a rotation operation, and the selection dial is rotated according to the rotation operation of the selection dial . and indexing means for indexing the position of the contacts in selecting a pattern cam contacts are connected to the needle swing device corresponds to the desired該割out shape, driving gear for driving the indexing means If, having internal teeth inscribed with the drive gear, and a figurative internal gear of the indexing shape are arranged on the outer peripheral surface in the circumferential direction corresponding to each indexing position indexed by該割out means, the A position indexing selection device for a multi-pattern sewing sewing machine , wherein the shape internal gear is supported by a bearing that can be adjusted in a swinging direction around a meshing portion of the internal gear and the drive gear inscribed It is.
[0008]
(Function)
When the selection dial is turned, the drive gear rotates to drive the indexing means (selection cam) . The indexing means calculates the position of the contact when the contact that rotates and is connected to the sewing needle swinging device selects the pattern cam corresponding to the desired index shape, and contacts at the index position. Activate the child. The transmission system from the drive gear for driving the indexing means to the figure internal gear constitutes a reduction gear mechanism, and the figure internal gear is also rotated by rotating the selection dial, and the index position is selected according to the figure.
[0009]
The shape internal gear can swing around the meshing portion with the drive gear by the bearing portion, and the index shape of the outer peripheral surface can be adjusted to the position of the pointer.
The invention of claim 2, wherein the indexing shape of said shape internal gear, represents a pattern of the multi-pattern stitch sewing machine, and characterized in that the visible from the opening of the operation panel of the multi-pattern sewing machine . Since the index figure indicated on the figure internal gear can be visually recognized, when the index figure deviates from the index position, the deviation can be corrected by adjusting the bearing portion.
[0010]
According to a third aspect of the present invention, the selection dial is fixed to one end of a dial shaft that is rotatably held on a mounting plate fixed to a machine frame of the multi-pattern sewing machine, and an intermediate portion of the dial shaft. The drive gear that meshes with the gear portion of the selection cam is fixed , and the rotation operation of the selection dial and the drive gear is directly connected via the dial shaft. The speed reduction gear mechanism for transmitting the motor to the figure internal gear is realized by a simple configuration of the drive gear and the figure internal gear.
According to a fourth aspect of the present invention, the indexing means is a cam body having a gear portion that meshes with the drive gear, and the number of teeth of the gear portion and the number of teeth of the shape internal gear are set to 1: 1. It is characterized by being. This makes it easy to make the indexing position of the indexing means and the phase of the figure internal gear one-to-one.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
The present invention relates to a pattern cam group having each cam shape corresponding to a sewing pattern, and a contact for causing a needle bar to perform a swinging motion in accordance with the cam shape of the cam when it comes into contact with one cam in the pattern cam group. It can be applied to a multi-pattern stitching machine having an element and a selection cam as an indexing means for bringing the contactor into contact with one of the pattern cams at an indexing position. The index position selection driving means to be configured has the following configuration.
[0012]
That is, the index position selection drive means, a selection dial that is rotated, a drive gear that is directly connected to the selection dial via a dial shaft and rotates according to the rotation operation to drive the selection cam; A cylindrical body having an inner tooth with an inner diameter larger than the outer diameter of the drive gear, the shape of the pattern is indicated on the outer peripheral surface along the circumferential direction, and the drive gear is inscribed in the inner tooth. And a figure internal gear as a pattern display body which rotates at a fixed position by rotation of the gear and makes the index figure visible from the opening of the operation panel.
[0013]
The shape internal gear can be swung around the meshing portion with the drive gear by the bearing portion, and the index shape of the outer peripheral surface can be adjusted to the position of the pointer.
The selection dial is directly connected to the drive gear, and the drive gear meshes with a gear portion of the selection cam and a figure internal gear.
The multi-pattern sewing machine position index selection device of the present invention can be employed in machine tools other than the sewing machine.
[0014]
【Example】
Hereinafter, the present invention will be described in more detail with reference to an embodiment shown in FIGS.
1 and 2, a multi-pattern stitching machine position index selection device 1 is constituted by a mounting plate 2 fixed to a sewing machine frame (not shown). A selection cam shaft 3, a contact support shaft 4 and a pattern cam shaft 5 are fixed to the mounting plate 2 in parallel. Of each shaft, the pattern cam shaft 5 supports a pattern cam group 6 composed of a plurality of cam plates and a gear 7 for controlling the swing position of the needle bar so as to maintain the same phase. The gear 7 meshes with a reduction gear 9 fixed to the upper shaft 8, and the pattern cam group 6 and the gear 7 rotate at a reduced speed in conjunction with the rotation of the upper shaft 8 .
[0015]
The contact support shaft 4 is disposed between the selection cam shaft 3 and the pattern cam shaft 5, and a plurality of contact groups 10 to be brought into contact with one of the pattern cam groups 6 are rotatably supported and release contact is made. The child 11 is fixed to be able to engage with the contact group 10.
A selection cam 12 constituting indexing means is fixed to the selection cam shaft 3 immediately below the contact group 10. The selection cam 12 brings one or more of the contact groups 10 at positions determined by the cam shape into contact with the corresponding pattern cam group 6. Each of the contact groups 10 is connected to a well-known sewing needle swinging device (not shown), and swings the sewing needles according to a pattern determined by one or more cams selected from the pattern cam group 6.
[0016]
The mounting plate 2 is also configured with indexing position selection driving means for determining the indexing position of the selection cam 12. As shown in FIGS. 1 to 3, the index position selection drive means is formed on the end surface of the selection cam 12 by being fixed to the dial shaft 13 intersecting with the selection cam shaft 3 and a screw 14 in the middle of the dial shaft 13. An indexing shape 16B having a driving gear 15 meshing with the gear portion 12A and an internal tooth 16A inscribed in the driving gear 15 and corresponding to each indexing position indexed by the selection cam 12 is provided on the outer circumferential surface in the circumferential direction. The arranged internal gears 16, the holding pieces 17 as bearings for rotatably supporting the internal gears 16, and the operation panel attached to the end of the dial shaft 13 and integrated with the sewing machine frame It comprises a selection dial 19 that is rotated from the outside of the section 18.
[0017]
The holding piece 17 has a tridentally extending circumferential receiving surface 17A that is in sliding contact with the inner peripheral surface 16C of the inner teeth deeper in the axial direction than the internal teeth 16A, and is formed on the mounting plate 2 as shown in FIG. It is fastened to the mounting plate 2 by a screw 20 inserted through the elongated hole 2A. Circumferential receiving surface 17A is formed so as to rotate in the figure in the toothed wheel 16, bearing points screws 20 can be smoothly performed. The long hole 2A is formed in an arc shape around the dial shaft 13, that is, the meshing portion of the drive gear 15 and the internal teeth 16A, and the distance P between the screw 20 and the dial shaft 13 can be finely adjusted. The holding pieces 17, the axial position of the figurative internal gear 16 ribs 17B extends from the inner tooth inner circumferential surface 16C of the figurative internal gear 16 on the inner circumferential surface 16D of the large diameter is restricted.
[0018]
Further, as shown in FIG. 5, the outer peripheral surface of the figure internal gear 16 is positioned in the opening 23 </ b> A of the decorative plate 23 in which the pointer 22 is printed in the concave portion 21 of the operation panel 18.
The present embodiment has the above-described configuration, and the operation will be described below. To select a pattern, that is, to determine the position, the selection dial 19 is operated so that the desired one of the index shapes 16B indicated on the shape internal gear 16 is located at the position of the pointer 22 . When the selection dial 19 is rotated, the drive gear 15 is rotated, and the selection cam 12 and the figure internal gear 16 are rotated.
[0019]
When the selection cam 19 rotates, the release contact 11 swings to the left about the contact support shaft 4 in FIG. 2 for each index position, and corresponds to the pattern of the index shape 16B in accordance with the pointer 22. The positions of the plurality of contacts are indexed one after another by the selection cam 12 , and the one or more contacts are engaged with the corresponding cam surfaces of the pattern cam group 6 to sew the pattern of the shape corresponding to the pointer 22. can do.
[0020]
In this embodiment, by loosening the screw 20 to which the holding piece 17 is fastened and adjusting the distance P (shown in FIG. 4) between the holding piece 17 and the dial shaft 13, It is possible to correct the misalignment between the pointer 22 and the index shape 16B due to the backlash that meshes. Further, as shown in FIG. 6, the position of the screw 20 is adjusted on the long hole 2A, and the holding piece 17 is swung to correct the positional deviation between the pointer 22 and the index shape 16B due to the accuracy of the parts. can do.
[0021]
Further, in this embodiment, the selection dial 19 is fixed to one end portion of the dial shaft 13 which is rotatably held on the mounting plate 2 fixed to the machine frame of the sewing machine (not shown) and is attached to an intermediate portion of the dial shaft 13. The drive gear 15 that meshes with the gear portion 12A of the selection cam 12 is fixed, and the rotation operation of the selection dial 19 and the drive gear 15 is directly connected via the dial shaft 13, and the drive gear 15 is Since it is meshed with the internal teeth 16A of the figure internal gear 16 , the selection cam 12 is rotated by a simple reduction gear mechanism of the drive gear 15 and the figure internal gear 16 with a pattern display body (of the figure internal gear 16). The outer peripheral surface) can be easily adjusted for rotation. Furthermore, if the number of teeth of the gear portion 12A of the selection cam 12 and the number of teeth of the internal teeth 16A of the model internal gear 16 are in a one-to-one correspondence, the design is facilitated.
【The invention's effect】
As described above, according to the present invention, the drive gear driven by the selection dial is inscribed, and the shape internal gear that describes the index position in the circumferential direction of the outer peripheral surface is provided. The shift between the shape and the pointer can be corrected with a simple configuration for adjusting the meshing with the shape internal gear.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram showing a configuration of an embodiment in which the present invention is adopted in a sewing machine.
FIG. 2 is a position index selection device according to one embodiment, and is a cross-sectional view taken along line BB in FIG.
FIG. 3 is a left side view of FIG. 4;
FIG. 4 is a front view of the position index selection device according to the embodiment.
FIG. 5 is a front view showing a display unit of the position index selection device.
6 is an explanatory diagram showing a method for correcting a deviation between a pointer and a figure according to an embodiment of the present invention, as viewed from the position of the line AA in FIG. 3;
[Explanation of symbols]
12 is a selection cam (indexing means), 15 is a drive gear, 19 is a selection dial, 16A is an internal tooth, 16B is an indexing shape, 16 is a shape internal gear, 17 is a holding piece (bearing portion), 22 is a pointer , 23A are openings.

Claims (4)

A selection dial for selecting a desired index figure from a plurality of figure figure groups by rotating operation;
An index for determining the position of the contact when the contact which is rotated according to the rotation operation of the selection dial and is connected to the sewing needle swinging device selects a pattern cam corresponding to the desired index shape. Taking out means ,
A drive gear for transmitting the rotation of the selection dial to the indexing means ;
Has internal teeth inscribed with the drive gear, and a figurative internal gear of the indexing shape corresponding to each indexing position is arranged on the outer peripheral surface in the circumferential direction of indexed by該割out means,
A position index selection device for a multi-pattern sewing machine having
The multi-pattern sewing sewing machine position index selection is characterized in that the shape internal gear is supported by a bearing portion that can be adjusted in a swinging direction around a meshing portion of the drive gear that is inscribed in the internal teeth. apparatus. The indexing shape of said shape internal gear, said represents a pattern of a multi-pattern sewing machine, multi-pattern according to claim 1, characterized in that the visible from the opening of the operation panel of the multi-pattern sewing machine Sewing machine position index selection device. The selection dial is fixed to one end portion of a dial shaft that is rotatably held on a mounting plate fixed to a machine frame of the multi-pattern sewing machine, and a gear portion of a selection cam is provided at an intermediate portion of the dial shaft. The drive gear meshing with is fixed ,
2. The position index selection device for a multi-pattern sewing machine according to claim 1, wherein the rotation operation of the selection dial and the drive gear is directly connected via the dial shaft . The indexing means is a cam body having a gear portion that meshes with the drive gear, and the number of teeth of the gear portion and the number of teeth of the shape internal gear are set to 1: 1. The position index selection device for a multi-pattern sewing machine according to claim 1.

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